The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1988
Filed:
May. 13, 1987
Applicant:
Inventor:
Shoji Futamura, Kawasaki, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23H / ;
U.S. Cl.
CPC ...
219 / ; 219 / ;
Abstract
An electrical discharge machining apparatus having an electrode and a work table on which a workpiece is placed for machining the workpiece by causing an electric discharge between the electrode and the workpiece. A shielding cover for forming a substantially enclosed predetermined space around main structural members comprising the electrical discharging apparatus is provided. A gas is introduced into the space formed by the shielding cover so as to keep the temperature in the space at a constant level.